Stack

A Stack is a container-type component that abstracts the implementation of a flexbox in order to define the layout of its children components.

Stack Properties

Although the Stack component has a number of different properties, there are three in particular that define the overall layout that the component has:

1. Direction: Refers to whether the stacking of children components is horizontal or vertical. By default the Stack component is vertical, but can be turned horizontal by adding the horizontal property when using the component.

2. Alignment: Refers to how the children components are aligned inside the container. This is controlled via the verticalAlign and horizontalAlign properties. One thing to notice here is that while flexbox containers align always across the cross axis, Stack aims to remove the mental strain involved in this process by making the verticalAlign and horizontalAlign properties always follow the vertical and horizontal axes, respectively, regardless of the direction of the Stack.

3. Spacing: Refers to the space that exists between children components inside the Stack. This is controlled via the gap and verticalGap properties.

Stack Items

The Stack component provides an abstraction of a flexbox container but there are some flexbox related properties that are applied on specific children of the flexbox instead of being applied on the container. This is where Stack Items comes into play.

A Stack Item abstracts those properties that are or can be specifically applied on flexbox's children, like grow and shrink.

To use a Stack Item in an application, the Stack component should be imported and Stack.Item should be used inside of a Stack. This is done so that the existence of the Stack Item is inherently linked to the Stack component.

Stack Wrapping

Aside from the previously mentioned properties, there is another property called wrap that determines if items overflow the Stack container or wrap around it. The wrap property only works in the direction of the Stack, which means that the children components can still overflow in the perpendicular direction (i.e. in a Vertical Stack, items might overflow horizontally and vice versa).

Stack Nesting

Stacks can be nested inside one another in order to be able to configure the layout of the application as desired.

For more details and examples visit the official docs. The R package cannot handle each and every case, so for advanced use cases you need to work using the original docs to achieve the desired result.

Usage

Stack(...)

Arguments

...

Props to pass to the component. The allowed props are listed below in the Details section.

Value

Object with shiny.tag class suitable for use in the UI of a Shiny app.

Details

• align 'auto' | 'stretch' | 'baseline' | 'start' | 'center' | 'end'
  Defines how to align the StackItem along the x-axis (for vertical Stacks) or the y-axis (for horizontal Stacks).

• className string
  Defines a CSS class name used to style the StackItem.

• disableShrink boolean
  Defines whether the StackItem should be prevented from shrinking. This can be used to prevent a StackItem from shrinking when it is inside of a Stack that has shrinking items.

• grow boolean | number | 'inherit' | 'initial' | 'unset'
  Defines how much to grow the StackItem in proportion to its siblings.

• order number | string
  Defines order of the StackItem.

• shrink boolean | number | 'inherit' | 'initial' | 'unset'
  Defines at what ratio should the StackItem shrink to fit the available space.

• verticalFill boolean
  Defines whether the StackItem should take up 100% of the height of its parent.

• as React.ElementType<React.HTMLAttributes<HTMLElement>>
  Defines how to render the Stack.

• disableShrink boolean
  Defines whether Stack children should not shrink to fit the available space.

• gap number | string
  Defines the spacing between Stack children. The property is specified as a value for 'row gap', followed optionally by a value for 'column gap'. If 'column gap' is omitted, it's set to the same value as 'row gap'.

• grow boolean | number | 'inherit' | 'initial' | 'unset'
  Defines how much to grow the Stack in proportion to its siblings.

• horizontal boolean
  Defines whether to render Stack children horizontally.

• horizontalAlign Alignment
  Defines how to align Stack children horizontally (along the x-axis).

• maxHeight number | string
  Defines the maximum height that the Stack can take.

• maxWidth number | string
  Defines the maximum width that the Stack can take.

• padding number | string
  Defines the inner padding of the Stack.

• reversed boolean
  Defines whether to render Stack children in the opposite direction (bottom-to-top if it's a vertical Stack and right-to-left if it's a horizontal Stack).

• verticalAlign Alignment
  Defines how to align Stack children vertically (along the y-axis).

• verticalFill boolean
  Defines whether the Stack should take up 100% of the height of its parent. This property is required to be set to true when using the grow flag on children in vertical oriented Stacks. Stacks are rendered as block elements and grow horizontally to the container already.

• wrap boolean
  Defines whether Stack children should wrap onto multiple rows or columns when they are about to overflow the size of the Stack.

Examples

library(shiny)
library(shiny.fluent)

ui <- function(id) {
  ns <- NS(id)
  Stack(
    tokens = list(childrenGap = 10),
    reversed = TRUE,
    span("Item One"),
    span("Item Two"),
    span("Item Three")
  )
}

server <- function(id) {
  moduleServer(id, function(input, output, session) {})
}

if (interactive()) {
  shinyApp(ui("app"), function(input, output) server("app"))
}